net: allow invalid TransportSecurityState to process invalid DNS names.

net/http/transport_security_state.cc

Index: net/http/transport_security_state.cc
diff --git a/net/http/transport_security_state.cc b/net/http/transport_security_state.cc
index df2d95f103563b8dd40f27d4a8c805cabfc38b30..2515a4bec53b5f055e8e32bd1b5179cbcb2b6649 100644
--- a/net/http/transport_security_state.cc
+++ b/net/http/transport_security_state.cc
@@ -244,18 +244,8 @@ std::string TransportSecurityState::CanonicalizeHost(const std::string& host) {
       break;
 
     for (size_t j = 0; j < label_length; ++j) {
-      // RFC 3490, 4.1, step 3
-      if (!IsSTD3ASCIIValidCharacter(new_host[i + 1 + j]))
-        return std::string();
-
       new_host[i + 1 + j] = tolower(new_host[i + 1 + j]);
     }
-
-    // step 3(b)
-    if (new_host[i + 1] == '-' ||
-        new_host[i + label_length] == '-') {
-      return std::string();
-    }
   }
 
   return new_host;